采用平均翻修寿命概念后必须采用视情维护和状态监控技术，以保证飞行的安全性。
While accepting the mean TBO concept, on-condition maintenance and condition monitoring technology must be adopted in engine operation in order to obtain sufficient flight safety.
采用平均翻修寿命概念后必须采用视情维护和状态监控技术，以保证飞行的安全性。
While accepting the mean TBO concept, on-condition maintenance and condition monitoring technology must be adopted in engine operation in order to obtain sufficient flight safety.
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